What are your guys thought on the aftermarket IAT sensor that VMP sells.Looks like a typical Gm IAT sensor. Do we need to re-calibrate the IAT transfer function in the software? I would say yes as it is no longer in the maf. I wounder if the difference is anything to worry with.
LSX AM 444
Runner up in points 2011
3rd in points 2012
8.14@166 all motor
Driver/ Tuner car 414 Texas mile 263.2mph
Also interested in this. Strangely their description says "stock style" tunes which to me means NOT a Whipple operating system. Doesn't the Whipple tune already sample IAT in a different way?
So if I am reading correctly, the Whipple install has the installer put in a pigtail connector to one of the IMRC connectors, and runs it to a new ACT sensor installed in the intake manifold, post intercooler that uses the output sent originally to the IMRC control. It is NOT readable via the scanner and is NOT mapped to a PID in the calibration.
This is different than how the VMP pigtail works, which simply "splits off" the wires that went to the MAF/ACT sensor in the factory location and allows the extension to reach a new sensor which gets installed in the blower manifold. This would be a relocation of the sensor reading but not adding an additional actual sensor. While to me it offers the benefit of seeing post intercooler temps, it doesn't allow you to monitor pre blower temps, youre stuck with just one reading.
I have no idea if the sensor they are providing has the same properties as the stock MAF based ACT sensor, but I would guess it isn't the same and you would need to tweak the tune to match the new sensor.
Last edited by 06300CSRT8; 07-25-2017 at 02:38 PM.
So Whipple confirmed their setup is NOT readable and is not mapped to a PID in the tune calibration.
That said, they confirmed it is a GT500 sensor and can be read converting the ohms using the standard GT500 calibration info.
This isn’t something Mr Brooks could help with is it??Originally Posted by 06300CSRT8
I haven’t seen a Whipple electrical schematic but I thought one of those left over IMRC plugs was used to control the heat exchanger pump or fans....
HP tuners fixed it, it’s now available as IAT2 in the scanner
Tho I will say I am suspect of its accuracy, seems to not move very much at all, I’ve wondered if what were logging in the scanner is heavily filtered/smoothed Or just a modeled intake air temp.
What happened to your idea to log that via a custom PID? I thought you figured out the GT500 sensor with a formula
Def did and it worked, but man the output moves around ALOT. Very close to selling the car so progress has slowed
Reply With Quote